Adds negation for material names and presets #13

src/main/java/net/knarcraft/blacksmith/config/SmithPreset.java

@@ -1,6 +1,7 @@
 package net.knarcraft.blacksmith.config;
 
 import net.knarcraft.blacksmith.BlacksmithPlugin;
+import net.knarcraft.blacksmith.util.ItemHelper;
 import org.bukkit.Material;
 
 import java.util.ArrayList;
@@ -12,6 +13,11 @@ import java.util.logging.Level;
  */
 public enum SmithPreset {
 
+    /**
+     * A blacksmith capable of re-forging everything
+     */
+    BLACKSMITH(new SmithPresetFilter[]{}),
+
     /**
      * A blacksmith capable of re-forging all weapons (including shields)
      */
@@ -81,6 +87,12 @@ public enum SmithPreset {
      * @return <p>The string, possibly with the preset replaced</p>
      */
     public static String replacePreset(String possiblePreset) {
+        boolean negated = false;
+        if (possiblePreset.startsWith("-")) {
+            negated = true;
+            possiblePreset = possiblePreset.substring(1);
+        }
+
         String upperCasedPreset = possiblePreset.replace('-', '_').toUpperCase();
         if (!upperCasedPreset.startsWith("PRESET:")) {
             return possiblePreset;
@@ -105,11 +117,16 @@ public enum SmithPreset {
         }
 
         //Return the list of materials included in the preset
+        List<String> materialNames;
         if (filter != null) {
-            return String.join(",", preset.getMaterialNames(filter));
+            materialNames = preset.getMaterialNames(filter);
         } else {
-            return String.join(",", preset.getMaterialNames());
+            materialNames = preset.getMaterialNames();
         }
+        if (negated) {
+            materialNames = negateMaterials(materialNames);
+        }
+        return String.join(",", materialNames);
     }
 
     /**
@@ -131,6 +148,7 @@ public enum SmithPreset {
      */
     public List<Material> getMaterials() {
         return switch (this) {
+            case BLACKSMITH -> ItemHelper.getAllReforgeAbleMaterials();
             case WEAPON_SMITH -> getWeapons();
             case ARMOR_SMITH -> getArmor();
             case TOOL_SMITH -> getTools();
@@ -247,4 +265,20 @@ public enum SmithPreset {
         return items;
     }
 
+    /**
+     * Negates the given material names
+     *
+     * @param materials <p>The material names to negate</p>
+     * @return <p>The negated material names</p>
+     */
+    private static List<String> negateMaterials(List<String> materials) {
+        List<String> negatedMaterials = new ArrayList<>(materials.size());
+        materials.forEach((material) -> {
+            if (material != null && !material.isBlank()) {
+                negatedMaterials.add("-" + material);
+            }
+        });
+        return negatedMaterials;
+    }
+
 }